1
|
Mussakhanuly N, Choi E, L Chin R, Wang Y, Seidel J, Green MA, M Soufiani A, Hao X, Yun JS. Multifunctional Surface Treatment against Imperfections and Halide Segregation in Wide-Band Gap Perovskite Solar Cells. ACS APPLIED MATERIALS & INTERFACES 2024; 16:7961-7972. [PMID: 38290432 DOI: 10.1021/acsami.3c12616] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/01/2024]
Abstract
Mixed-halide wide-band gap perovskites (WBPs) still suffer from losses due to imperfections within the absorber and the segregation of halide ions under external stimuli. Herein, we design a multifunctional passivator (MFP) by mixing bromide salt, formamidinium bromide (FABr) with a p-type self-assembled monolayer (SAM) to target the nonradiative recombination pathways. Photoluminescence measurement shows considerable suppression of nonradiative recombination rates after treatment with FABr. However, WBPs still remained susceptible to halide segregation for which the addition of 25% p-type SAM was effective to decelerate segregation. It is observed that FABr can act as a passivating agent of the donor impurities, shifting the Fermi-level (Ef) toward the mid-band gap, while p-type SAM could cause an overweight of Ef toward the valence band. Favorable band bending at the interface could prevent the funneling of carriers toward I-rich clusters. Instead, charge carriers funnel toward an integrated SAM, preventing the accumulation of polaron-induced strain on the lattice. Consequently, n-i-p structured devices with an optimal MFP treatment show an average open-circuit voltage (VOC) increase of about 20 mV and fill factor (FF) increase by 4% compared with the control samples. The unencapsulated devices retained 95% of their initial performance when stored at room temperature under 40% relative humidity for 2800 h.
Collapse
Affiliation(s)
- Nursultan Mussakhanuly
- Australian Centre for Advanced Photovoltaics, School of Photovoltaic and Renewable Energy Engineering, University of New South Wales (UNSW), Sydney 2052, Australia
| | - Eunyoung Choi
- Australian Centre for Advanced Photovoltaics, School of Photovoltaic and Renewable Energy Engineering, University of New South Wales (UNSW), Sydney 2052, Australia
- Department of Chemical Engineering and Biotechnology, University of Cambridge, Cambridge CB3 0AS, U.K
- Dimond Light Source, Harwell Science and Innovation Campus, Didcot OX11 0DE, Oxfordshire, U.K
| | - Robert L Chin
- Australian Centre for Advanced Photovoltaics, School of Photovoltaic and Renewable Energy Engineering, University of New South Wales (UNSW), Sydney 2052, Australia
| | - Yihao Wang
- Australian Centre for Advanced Photovoltaics, School of Photovoltaic and Renewable Energy Engineering, University of New South Wales (UNSW), Sydney 2052, Australia
| | - Jan Seidel
- Australian Centre for Advanced Photovoltaics, School of Photovoltaic and Renewable Energy Engineering, University of New South Wales (UNSW), Sydney 2052, Australia
| | - Martin A Green
- Australian Centre for Advanced Photovoltaics, School of Photovoltaic and Renewable Energy Engineering, University of New South Wales (UNSW), Sydney 2052, Australia
| | - Arman M Soufiani
- Australian Centre for Advanced Photovoltaics, School of Photovoltaic and Renewable Energy Engineering, University of New South Wales (UNSW), Sydney 2052, Australia
| | - Xiaojing Hao
- Australian Centre for Advanced Photovoltaics, School of Photovoltaic and Renewable Energy Engineering, University of New South Wales (UNSW), Sydney 2052, Australia
| | - Jae S Yun
- Australian Centre for Advanced Photovoltaics, School of Photovoltaic and Renewable Energy Engineering, University of New South Wales (UNSW), Sydney 2052, Australia
- Advanced Technology Institute, Department of Electrical and Electronic Engineering, University of Surrey, Guildford GU2 7XH, Surrey, U.K
| |
Collapse
|
2
|
Martin P, Dlubak B, Mattana R, Seneor P, Martin MB, Henner T, Godel F, Sander A, Collin S, Chen L, Suffit S, Mallet F, Lafarge P, Della Rocca ML, Droghetti A, Barraud C. Combined spin filtering actions in hybrid magnetic junctions based on organic chains covalently attached to graphene. NANOSCALE 2022; 14:12692-12702. [PMID: 35993375 DOI: 10.1039/d2nr01917e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
We present a bias-controlled spin-filtering mechanism in spin-valves including a hybrid organic chain/graphene interface. Wet growth conditions of oligomeric molecular chains would usually lead, during standard CMOS-compatible fabrication processes, to the quenching of spintronics properties of metallic spin sources due to oxidation. We demonstrate by X-ray photoelectron spectroscopy that the use of a protective graphene layer fully preserves the metallic character of the ferromagnetic surface and thus its capability to deliver spin polarized currents. We focus here on a small aromatic chain of controllable lengths, formed by nitrobenzene monomers and derived from the commercial 4-nitrobenzene diazonium tetrafluoroborate, covalently attached to the graphene passivated spin sources thanks to electroreduction. A unique bias dependent switch of the spin signal is then observed in complete spin valve devices, from minority to majority spin carriers filtering. First-principles calculations are used to highlight the key role played by the spin-dependent hybridization of electronic states present at the different interfaces. Our work is a first step towards the exploration of spin transport using different functional molecular chains. It opens the perspective of atomic tailoring of magnetic junction devices towards spin and quantum transport control, thanks to the flexibility of ambient electrochemical surface functionalization processes.
Collapse
Affiliation(s)
- Pascal Martin
- Université Paris Cité, Laboratoire ITODYS, CNRS, UMR 7086, 75013 Paris, France
| | - Bruno Dlubak
- Unité Mixte de Physique, CNRS, Thales, Université Paris-Saclay, 91767 Palaiseau, France.
| | - Richard Mattana
- Unité Mixte de Physique, CNRS, Thales, Université Paris-Saclay, 91767 Palaiseau, France.
| | - Pierre Seneor
- Unité Mixte de Physique, CNRS, Thales, Université Paris-Saclay, 91767 Palaiseau, France.
| | - Marie-Blandine Martin
- Unité Mixte de Physique, CNRS, Thales, Université Paris-Saclay, 91767 Palaiseau, France.
| | - Théo Henner
- Université Paris Cité, Laboratoire Matériaux et Phénomènes Quantiques, CNRS, UMR 7162, 75013 Paris, France.
| | - Florian Godel
- Unité Mixte de Physique, CNRS, Thales, Université Paris-Saclay, 91767 Palaiseau, France.
| | - Anke Sander
- Unité Mixte de Physique, CNRS, Thales, Université Paris-Saclay, 91767 Palaiseau, France.
| | - Sophie Collin
- Unité Mixte de Physique, CNRS, Thales, Université Paris-Saclay, 91767 Palaiseau, France.
| | - Linsai Chen
- Université Paris Cité, Laboratoire ITODYS, CNRS, UMR 7086, 75013 Paris, France
| | - Stéphan Suffit
- Université Paris Cité, Laboratoire Matériaux et Phénomènes Quantiques, CNRS, UMR 7162, 75013 Paris, France.
| | - François Mallet
- Université Paris Cité, Laboratoire Matériaux et Phénomènes Quantiques, CNRS, UMR 7162, 75013 Paris, France.
| | - Philippe Lafarge
- Université Paris Cité, Laboratoire Matériaux et Phénomènes Quantiques, CNRS, UMR 7162, 75013 Paris, France.
| | - Maria Luisa Della Rocca
- Université Paris Cité, Laboratoire Matériaux et Phénomènes Quantiques, CNRS, UMR 7162, 75013 Paris, France.
| | | | - Clément Barraud
- Université Paris Cité, Laboratoire Matériaux et Phénomènes Quantiques, CNRS, UMR 7162, 75013 Paris, France.
| |
Collapse
|
3
|
Thomas L, Guérin D, Quinard B, Jacquet E, Mattana R, Seneor P, Vuillaume D, Mélin T, Lenfant S. Conductance switching at the nanoscale of diarylethene derivative self-assembled monolayers on La 0.7Sr 0.3MnO 3. NANOSCALE 2020; 12:8268-8276. [PMID: 32236177 DOI: 10.1039/c9nr09928j] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
We report on the phosphonic acid route for the grafting of functional molecules, optical switch (dithienylethene diphosphonic acid, DDA), on La0.7Sr0.3MnO3 (LSMO). Compact self-assembled monolayers (SAMs) of DDA are formed on LSMO as studied by topographic atomic force microscopy (AFM), ellipsometry, water contact angle measurements and X-ray photoemission spectroscopy (XPS). The conducting AFM measurements show that the electrical conductance of LSMO/DDA is about 3 decades below that of a bare LSMO substrate. Moreover, the presence of the DDA SAM suppresses the known conductance switching of the LSMO substrate that is induced by mechanical and/or bias constraints during C-AFM measurements. A partial light-induced conductance switching between the open and closed forms of the DDA is observed for the LSMO/DDA/C-AFM tip molecular junctions (closed/open conductance ratio of about 8). We show that, in the case of long-time exposure to UV light, this feature can be masked by a non-reversible decrease (a factor of about 15) of the conductance of the LSMO electrode.
Collapse
Affiliation(s)
- L Thomas
- Institute for Electronics Microelectronics and Nanotechnology (IEMN), CNRS, Univ. Lille, 59652 Villeneuve d'Ascq, France.
| | | | | | | | | | | | | | | | | |
Collapse
|
4
|
Abendroth JM, Stemer DM, Bloom BP, Roy P, Naaman R, Waldeck DH, Weiss PS, Mondal PC. Spin Selectivity in Photoinduced Charge-Transfer Mediated by Chiral Molecules. ACS NANO 2019; 13:4928-4946. [PMID: 31016968 DOI: 10.1021/acsnano.9b01876] [Citation(s) in RCA: 54] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Optical control and readout of electron spin and spin currents in thin films and nanostructures have remained attractive yet challenging goals for emerging technologies designed for applications in information processing and storage. Recent advances in room-temperature spin polarization using nanometric chiral molecular assemblies suggest that chemically modified surfaces or interfaces can be used for optical spin conversion by exploiting photoinduced charge separation and injection from well-coupled organic chromophores or quantum dots. Using light to drive photoexcited charge-transfer processes mediated by molecules with central or helical chirality enables indirect measurements of spin polarization attributed to the chiral-induced spin selectivity effect and of the efficiency of spin-dependent electron transfer relative to competitive relaxation pathways. Herein, we highlight recent approaches used to detect and to analyze spin selectivity in photoinduced charge transfer including spin-transfer torque for local magnetization, nanoscale charge separation and polarization, and soft ferromagnetic substrate magnetization- and chirality-dependent photoluminescence. Building on these methods through systematic investigation of molecular and environmental parameters that influence spin filtering should elucidate means to manipulate electron spins and photoexcited states for room-temperature optoelectronic and photospintronic applications.
Collapse
Affiliation(s)
- John M Abendroth
- California NanoSystems Institute , University of California, Los Angeles , Los Angeles , California 90095 , United States
- Department of Chemistry and Biochemistry , University of California, Los Angeles , Los Angeles , California 90095 , United States
| | - Dominik M Stemer
- California NanoSystems Institute , University of California, Los Angeles , Los Angeles , California 90095 , United States
- Department of Materials Science and Engineering , University of California, Los Angeles , Los Angeles , California 90095 , United States
| | - Brian P Bloom
- Department of Chemistry , University of Pittsburgh , Pittsburgh , Pennsylvania 15260 , United States
| | - Partha Roy
- Department of Chemistry , Central University of Rajasthan , Kishangarh 305817 Ajmer , India
| | - Ron Naaman
- Department of Chemical and Biological Physics , Weizmann Institute of Science , Rehovot 76100 , Israel
| | - David H Waldeck
- Department of Chemistry , University of Pittsburgh , Pittsburgh , Pennsylvania 15260 , United States
| | - Paul S Weiss
- California NanoSystems Institute , University of California, Los Angeles , Los Angeles , California 90095 , United States
- Department of Chemistry and Biochemistry , University of California, Los Angeles , Los Angeles , California 90095 , United States
- Department of Materials Science and Engineering , University of California, Los Angeles , Los Angeles , California 90095 , United States
| | | |
Collapse
|
5
|
Nguyen HT, Jeon J, Ikeda T, Adachi K, Tsukahara Y. Polymeric molecular coating for oxidation resistance property of copper surface. Polym Bull (Berl) 2019. [DOI: 10.1007/s00289-018-2501-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
6
|
Forment-Aliaga A, Coronado E. Hybrid Interfaces in Molecular Spintronics. CHEM REC 2018; 18:737-748. [DOI: 10.1002/tcr.201700109] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2017] [Accepted: 02/16/2018] [Indexed: 01/08/2023]
Affiliation(s)
- Alicia Forment-Aliaga
- Instituto de Ciencia Molecular; Universitat de València; C/ Catedrático José Beltrán, 2. 46980 Paterna Spain
| | - Eugenio Coronado
- Instituto de Ciencia Molecular; Universitat de València; C/ Catedrático José Beltrán, 2. 46980 Paterna Spain
| |
Collapse
|
7
|
Yamakawa K, Takagi J, Nguyen HT, Adachi K, Tsukahara Y. Oxidation Resistance of Nickel Surface by Molecular Coating of Thiol-terminated Polymers. CHEM LETT 2018. [DOI: 10.1246/cl.170941] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Kosuke Yamakawa
- Faculty of Molecular Chemistry and Engineering, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Juri Takagi
- Faculty of Molecular Chemistry and Engineering, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Hai Thanh Nguyen
- Faculty of Molecular Chemistry and Engineering, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Kaoru Adachi
- Faculty of Molecular Chemistry and Engineering, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Yasuhisa Tsukahara
- Faculty of Molecular Chemistry and Engineering, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| |
Collapse
|
8
|
Cattani-Scholz A. Functional Organophosphonate Interfaces for Nanotechnology: A Review. ACS APPLIED MATERIALS & INTERFACES 2017; 9:25643-25655. [PMID: 28671811 DOI: 10.1021/acsami.7b04382] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Optimization of interfaces in inorganic-organic device systems depends strongly on understanding both the molecular processes that are involved in surface modification and the effects that such modifications have on the electronic states of the material. In particular, the last several years have seen passivation and functionalization of semiconductor surfaces to be strategies by which to realize devices with superior function by controlling Fermi level energies, band-gap magnitudes, and work functions of semiconducting substrates. Among all of the synthetic routes and deposition methods available for the optimization of functional interfaces in hybrid systems, organophosphonate chemistry has been found to be a powerful tool to control at the molecular level the properties of materials in many different applications. In this Review, we focus on the relevance of organophosphonate chemistry in nanotechnology, giving an overview about some recent advances in surface modification, interface engineering, nanostructure optimization, and biointegration.
Collapse
Affiliation(s)
- Anna Cattani-Scholz
- Walter Schottky Institut and Technische Universität München , 85748 Garching, Germany
| |
Collapse
|
9
|
Cinchetti M, Dediu VA, Hueso LE. Activating the molecular spinterface. NATURE MATERIALS 2017; 16:507-515. [PMID: 28439116 DOI: 10.1038/nmat4902] [Citation(s) in RCA: 140] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/10/2017] [Accepted: 03/23/2017] [Indexed: 05/19/2023]
Abstract
The miniaturization trend in the semiconductor industry has led to the understanding that interfacial properties are crucial for device behaviour. Spintronics has not been alien to this trend, and phenomena such as preferential spin tunnelling, the spin-to-charge conversion due to the Rashba-Edelstein effect and the spin-momentum locking at the surface of topological insulators have arisen mainly from emergent interfacial properties, rather than the bulk of the constituent materials. In this Perspective we explore inorganic/molecular interfaces by looking closely at both sides of the interface. We describe recent developments and discuss the interface as an ideal platform for creating new spin effects. Finally, we outline possible technologies that can be generated thanks to the unique active tunability of molecular spinterfaces.
Collapse
Affiliation(s)
- Mirko Cinchetti
- Experimentelle Physik VI, Technische Universität Dortmund, 44221 Dortmund, Germany
| | - V Alek Dediu
- Istituto per lo Studio dei Materiali Nanostrutturati CNRISMN, 40129 Bologna, Italy
| | - Luis E Hueso
- CIC nanoGUNE, 20018 San Sebastian, Spain
- IKERBASQUE, Basque Foundation for Science, 48013 Bilbao, Spain
| |
Collapse
|
10
|
Senthil kumar K, Jiang L, Nijhuis CA. Fabrication of ultra-smooth and oxide-free molecule-ferromagnetic metal interfaces for applications in molecular electronics under ordinary laboratory conditions. RSC Adv 2017. [DOI: 10.1039/c6ra27280k] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Direct self-assembly of n-alkanethiolate SAMs on ferromagnetic metal surface was fabricated. The stability and tunnelling characteristics of SAMs were investigated.
Collapse
Affiliation(s)
| | - Li Jiang
- Department of Chemistry
- National University of Singapore
- Singapore 117543
- Singapore
| | - Christian A. Nijhuis
- Department of Chemistry
- National University of Singapore
- Singapore 117543
- Singapore
- Centre for Advanced 2D Materials and Graphene Research Centre
| |
Collapse
|
11
|
Campbell VE, Tonelli M, Cimatti I, Moussy JB, Tortech L, Dappe YJ, Rivière E, Guillot R, Delprat S, Mattana R, Seneor P, Ohresser P, Choueikani F, Otero E, Koprowiak F, Chilkuri VG, Suaud N, Guihéry N, Galtayries A, Miserque F, Arrio MA, Sainctavit P, Mallah T. Engineering the magnetic coupling and anisotropy at the molecule-magnetic surface interface in molecular spintronic devices. Nat Commun 2016; 7:13646. [PMID: 27929089 PMCID: PMC5476799 DOI: 10.1038/ncomms13646] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2016] [Accepted: 10/14/2016] [Indexed: 11/26/2022] Open
Abstract
A challenge in molecular spintronics is to control the magnetic coupling between magnetic molecules and magnetic electrodes to build efficient devices. Here we show that the nature of the magnetic ion of anchored metal complexes highly impacts the exchange coupling of the molecules with magnetic substrates. Surface anchoring alters the magnetic anisotropy of the cobalt(II)-containing complex (Co(Pyipa)2), and results in blocking of its magnetization due to the presence of a magnetic hysteresis loop. In contrast, no hysteresis loop is observed in the isostructural nickel(II)-containing complex (Ni(Pyipa)2). Through XMCD experiments and theoretical calculations we find that Co(Pyipa)2 is strongly ferromagnetically coupled to the surface, while Ni(Pyipa)2 is either not coupled or weakly antiferromagnetically coupled to the substrate. These results highlight the importance of the synergistic effect that the electronic structure of a metal ion and the organic ligands has on the exchange interaction and anisotropy occurring at the molecule–electrode interface.
Controlling the magnetic response of a molecular device is important for spintronic applications. Here the authors report the self-assembly, magnetic coupling, and anisotropy of two transition metal complexes bound to a ferrimagnetic surface, and probe the role of the nature of the transition metal ion.
Collapse
Affiliation(s)
- Victoria E Campbell
- Institut de Chimie Moléculaire et des Matériaux d'Orsay (ICMMO), CNRS, Université Paris Sud, Université Paris Saclay, 91405 Orsay, France
| | - Monica Tonelli
- Institut de Chimie Moléculaire et des Matériaux d'Orsay (ICMMO), CNRS, Université Paris Sud, Université Paris Saclay, 91405 Orsay, France
| | - Irene Cimatti
- Institut de Chimie Moléculaire et des Matériaux d'Orsay (ICMMO), CNRS, Université Paris Sud, Université Paris Saclay, 91405 Orsay, France
| | - Jean-Baptiste Moussy
- SPEC, CEA, CNRS, Univesité Paris Saclay, CEA Saclay, 91191 Gif-sur-Yvette, France
| | - Ludovic Tortech
- IPCM, UMR CNRS 7201, UPMC, Université Pierre et Marie Curie, F-75005 Paris, France
| | - Yannick J Dappe
- SPEC, CEA, CNRS, Univesité Paris Saclay, CEA Saclay, 91191 Gif-sur-Yvette, France
| | - Eric Rivière
- Institut de Chimie Moléculaire et des Matériaux d'Orsay (ICMMO), CNRS, Université Paris Sud, Université Paris Saclay, 91405 Orsay, France
| | - Régis Guillot
- Institut de Chimie Moléculaire et des Matériaux d'Orsay (ICMMO), CNRS, Université Paris Sud, Université Paris Saclay, 91405 Orsay, France
| | - Sophie Delprat
- Unité Mixte de Physique CNRS/Thales, 1 Avenue Auguste Fresnel, 91767 Palaiseau, France and Université Paris-Sud, 91405 Orsay, France
| | - Richard Mattana
- Unité Mixte de Physique CNRS/Thales, 1 Avenue Auguste Fresnel, 91767 Palaiseau, France and Université Paris-Sud, 91405 Orsay, France
| | - Pierre Seneor
- Unité Mixte de Physique CNRS/Thales, 1 Avenue Auguste Fresnel, 91767 Palaiseau, France and Université Paris-Sud, 91405 Orsay, France
| | - Philippe Ohresser
- Synchrotron SOLEIL, L'Orme des Merisiers Saint-Aubin-BP 48, 91192 Gif-sur-Yvette, France
| | - Fadi Choueikani
- Synchrotron SOLEIL, L'Orme des Merisiers Saint-Aubin-BP 48, 91192 Gif-sur-Yvette, France
| | - Edwige Otero
- Synchrotron SOLEIL, L'Orme des Merisiers Saint-Aubin-BP 48, 91192 Gif-sur-Yvette, France
| | - Florian Koprowiak
- Laboratoire de Chimie et Physique Quantiques, Université de Toulouse III, 118, route de Narbonne, 31062 Toulouse, France
| | - Vijay Gopal Chilkuri
- Laboratoire de Chimie et Physique Quantiques, Université de Toulouse III, 118, route de Narbonne, 31062 Toulouse, France
| | - Nicolas Suaud
- Laboratoire de Chimie et Physique Quantiques, Université de Toulouse III, 118, route de Narbonne, 31062 Toulouse, France
| | - Nathalie Guihéry
- Laboratoire de Chimie et Physique Quantiques, Université de Toulouse III, 118, route de Narbonne, 31062 Toulouse, France
| | - Anouk Galtayries
- PSL Research University, Chimie ParisTech-CNRS, Institut de Recherche de Chimie Paris, F-75005 Paris, France
| | - Frederic Miserque
- CEA/DEN/DANS/DPC/SCCME, Laboratoire d'Etude de la Corrosion Aqueuse, F-91191 Gif-sur-Yvette, France
| | - Marie-Anne Arrio
- IMPMC-CNRS, Université Pierre et Marie Curie, F-75005 Paris, France
| | - Philippe Sainctavit
- Synchrotron SOLEIL, L'Orme des Merisiers Saint-Aubin-BP 48, 91192 Gif-sur-Yvette, France.,IMPMC-CNRS, Université Pierre et Marie Curie, F-75005 Paris, France
| | - Talal Mallah
- Institut de Chimie Moléculaire et des Matériaux d'Orsay (ICMMO), CNRS, Université Paris Sud, Université Paris Saclay, 91405 Orsay, France
| |
Collapse
|
12
|
Tatay S, Galbiati M, Delprat S, Barraud C, Bouzehouane K, Collin S, Deranlot C, Jacquet E, Seneor P, Mattana R, Petroff F. Self-assembled monolayers based spintronics: from ferromagnetic surface functionalization to spin-dependent transport. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2016; 28:094010. [PMID: 26871682 DOI: 10.1088/0953-8984/28/9/094010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Chemically functionalized surfaces are studied for a wide range of applications going from medicine to electronics. Whereas non-magnetic surfaces have been widely studied, functionalization of magnetic surfaces is much less common and has almost never been used for spintronics applications. In this article we present the functionalization of La2/3Sr1/3MnO3, a ferromagnetic oxide, with self-assembled monolayers for spintronics. La2/3Sr1/3MnO3 is the prototypical half-metallic manganite used in spintronics studies. First, we show that La2/3Sr1/3MnO3 can be functionalized by alkylphosphonic acid molecules. We then emphasize the use of these functionalized surfaces in spintronics devices such as magnetic tunnel junctions fabricated using a nano-indentation based lithography technique. The observed exponential increase of tunnel resistance as a function of alkyl chain length is a direct proof of the successful connection of molecules to ferromagnetic electrodes. For all alkyl chains studied we obtain stable and robust tunnel magnetoresistance, with effects ranging from a few tens to 10 000%. These results show that functionalized electrodes can be integrated in spintronics devices and open the door to a molecular engineering of spintronics.
Collapse
Affiliation(s)
- Sergio Tatay
- Unité Mixte de Physique CNRS-Thales, 1 Av. A. Fresnel, 91767 Palaiseau, France and Université Paris-Sud, 91405 Orsay, France. Instituto de Ciencia Molecular (ICMol), Universitat de Valencia, C. Caterdratico Jose Beltran 2, 46980 Paterna, Spain
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
13
|
IKEDA T, TAKATA T, TAKAGI J, ADACHI K, TSUKAHARA Y. Enhancement of Oxidation Resistance of Copper by an Organic Thin Layer and its Influence on Electrical Conductivity. KOBUNSHI RONBUNSHU 2016. [DOI: 10.1295/koron.2015-0071] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Takuya IKEDA
- Department of Molecular Chemistry, Kyoto Institute of Technology
- Tioh Create Co., Ltd
| | - Tomoki TAKATA
- Department of Molecular Chemistry, Kyoto Institute of Technology
| | - Juri TAKAGI
- Department of Molecular Chemistry, Kyoto Institute of Technology
| | - Kaoru ADACHI
- Department of Molecular Chemistry, Kyoto Institute of Technology
| | | |
Collapse
|
14
|
Escalera-López D, Gómez E, Vallés E. Electrochemical growth of CoNi and Pt-CoNi soft magnetic composites on an alkanethiol monolayer-modified ITO substrate. Phys Chem Chem Phys 2015; 17:16575-86. [PMID: 26055346 DOI: 10.1039/c5cp02291f] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
CoNi and Pt-CoNi magnetic layers on indium-tin oxide (ITO) substrates modified by an alkanethiol self-assembled monolayer (SAM) have been electrochemically obtained as an initial stage to prepare semiconducting layer-SAM-magnetic layer hybrid structures. The best conditions to obtain the maximum compactness of adsorbed layers of dodecanethiol (C12-SH) on ITO substrate have been studied using contact angle, AFM, XPS and electrochemical tests. The electrochemical characterization (electrochemical probe or voltammetric response in blank solutions) is fundamental to ensure the maximum blocking of the substrate. Although the electrodeposition process on the SAM-modified ITO substrate is very slow if the blocking of the surface is significant, non-cracked metallic layers of CoNi, with or without a previously electrodeposited seed-layer of platinum, have been obtained by optimizing the deposition potentials. Initial nucleation is expected to take place at the pinhole defects of the C12-SH SAM, followed by a mushroom-like growth regime through the SAM interface that allows the formation of a continuous metallic layer electrically connected to the ITO surface. Due to the potential of the methodology, the preparation of patterned metallic deposits on ITO substrate using SAMs with different coverage as templates is feasible.
Collapse
Affiliation(s)
- D Escalera-López
- Grup d'Electrodeposició de Capes Primes i Nanoestructures (Ge-CPN), Departament de Química Física and Institut de Nanociència i Nanotecnologia (IN2UB), Universitat de Barcelona, Martí i Franquès 1, 08028 Barcelona, Spain.
| | | | | |
Collapse
|
15
|
Caneschi A, Gatteschi D, Totti F. Molecular magnets and surfaces: A promising marriage. A DFT insight. Coord Chem Rev 2015. [DOI: 10.1016/j.ccr.2014.11.016] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
|
16
|
Mannini M, Bertani F, Tudisco C, Malavolti L, Poggini L, Misztal K, Menozzi D, Motta A, Otero E, Ohresser P, Sainctavit P, Condorelli GG, Dalcanale E, Sessoli R. Magnetic behaviour of TbPc2 single-molecule magnets chemically grafted on silicon surface. Nat Commun 2014; 5:4582. [PMID: 25109254 PMCID: PMC4129938 DOI: 10.1038/ncomms5582] [Citation(s) in RCA: 100] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2014] [Accepted: 07/02/2014] [Indexed: 12/26/2022] Open
Abstract
Single-molecule magnets (SMMs) are among the most promising molecular systems for the development of novel molecular electronics based on the spin transport. Going beyond the investigations focused on physisorbed SMMs, in this work the robust grafting of Terbium(III) bis(phthalocyaninato) complexes to silicon surface from a diluted solution is achieved by rational chemical design yielding the formation of a partially oriented monolayer on the conducting substrate. Here, by exploiting the surface sensitivity of X-ray circular magnetic dichroism we evidence an enhancement of the magnetic bistability of this single-molecule magnet, in contrast to the dramatic reduction of the magnetic hysteresis that characterises monolayer deposits evaporated on noble and ferromagnetic metals. Photoelectron spectroscopy investigations and density functional theory analysis suggest a non-innocent role played by the silicon substrate, evidencing the potentiality of this approach for robust integration of bistable magnetic molecules in electronic devices.
Collapse
Affiliation(s)
- Matteo Mannini
- Department of Chemistry 'Ugo Schiff' and INSTM RU, University of Firenze, via della Lastruccia 3-13, Sesto Fiorentino 50019, Italy
| | - Federico Bertani
- Department of Chemistry, University of Parma and INSTM RU, Parco Area delle Scienze 17/A, Parma 43124, Italy
| | - Cristina Tudisco
- Department of Chemical Science, University of Catania and INSTM RU, Viale Andrea Doria, 6, Catania 95125, Italy
| | - Luigi Malavolti
- Department of Chemistry 'Ugo Schiff' and INSTM RU, University of Firenze, via della Lastruccia 3-13, Sesto Fiorentino 50019, Italy
| | - Lorenzo Poggini
- Department of Chemistry 'Ugo Schiff' and INSTM RU, University of Firenze, via della Lastruccia 3-13, Sesto Fiorentino 50019, Italy
| | - Kasjan Misztal
- Department of Chemistry, University of Parma and INSTM RU, Parco Area delle Scienze 17/A, Parma 43124, Italy
| | - Daniela Menozzi
- Department of Chemistry, University of Parma and INSTM RU, Parco Area delle Scienze 17/A, Parma 43124, Italy
| | - Alessandro Motta
- Department of Chemical Science, University of Catania and INSTM RU, Viale Andrea Doria, 6, Catania 95125, Italy
| | - Edwige Otero
- Synchrotron SOLEIL, L'Orme des Merisiers Saint-Aubin-BP 48, Gif-sur-Yvette 91192, France
| | - Philippe Ohresser
- Synchrotron SOLEIL, L'Orme des Merisiers Saint-Aubin-BP 48, Gif-sur-Yvette 91192, France
| | - Philippe Sainctavit
- 1] Synchrotron SOLEIL, L'Orme des Merisiers Saint-Aubin-BP 48, Gif-sur-Yvette 91192, France [2] IMPMC-CNRS, Université Pierre et Marie Curie, 4 place Jussieu 75252 Paris 05, France
| | - Guglielmo G Condorelli
- Department of Chemical Science, University of Catania and INSTM RU, Viale Andrea Doria, 6, Catania 95125, Italy
| | - Enrico Dalcanale
- Department of Chemistry, University of Parma and INSTM RU, Parco Area delle Scienze 17/A, Parma 43124, Italy
| | - Roberta Sessoli
- Department of Chemistry 'Ugo Schiff' and INSTM RU, University of Firenze, via della Lastruccia 3-13, Sesto Fiorentino 50019, Italy
| |
Collapse
|